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authorTrond Myklebust <trond.myklebust@primarydata.com>2015-10-06 17:03:00 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-10-08 08:27:05 -0400
commita26480942c99d84a7682ea4c00f47a3a42ed41d2 (patch)
treedcc94326cdfcee579c27a1e8df46a1156ca91b6e /net/sunrpc
parentf9b2ee714c5c945cda27e9cbca5f60d5199fb93f (diff)
SUNRPC: Move AF_LOCAL receive data path into a workqueue context
Now that we've done it for TCP and UDP, let's convert AF_LOCAL as well. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/xprtsock.c72
1 files changed, 42 insertions, 30 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index df8bdcc10640..1471ecceabf9 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -909,44 +909,36 @@ static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
}
/**
- * xs_local_data_ready - "data ready" callback for AF_LOCAL sockets
- * @sk: socket with data to read
+ * xs_local_data_read_skb
+ * @xprt: transport
+ * @sk: socket
+ * @skb: skbuff
*
* Currently this assumes we can read the whole reply in a single gulp.
*/
-static void xs_local_data_ready(struct sock *sk)
+static void xs_local_data_read_skb(struct rpc_xprt *xprt,
+ struct sock *sk,
+ struct sk_buff *skb)
{
struct rpc_task *task;
- struct rpc_xprt *xprt;
struct rpc_rqst *rovr;
- struct sk_buff *skb;
- int err, repsize, copied;
+ int repsize, copied;
u32 _xid;
__be32 *xp;
- read_lock_bh(&sk->sk_callback_lock);
- dprintk("RPC: %s...\n", __func__);
- xprt = xprt_from_sock(sk);
- if (xprt == NULL)
- goto out;
-
- skb = skb_recv_datagram(sk, 0, 1, &err);
- if (skb == NULL)
- goto out;
-
repsize = skb->len - sizeof(rpc_fraghdr);
if (repsize < 4) {
dprintk("RPC: impossible RPC reply size %d\n", repsize);
- goto dropit;
+ return;
}
/* Copy the XID from the skb... */
xp = skb_header_pointer(skb, sizeof(rpc_fraghdr), sizeof(_xid), &_xid);
if (xp == NULL)
- goto dropit;
+ return;
/* Look up and lock the request corresponding to the given XID */
- spin_lock(&xprt->transport_lock);
+ spin_lock_bh(&xprt->transport_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
@@ -964,11 +956,35 @@ static void xs_local_data_ready(struct sock *sk)
xprt_complete_rqst(task, copied);
out_unlock:
- spin_unlock(&xprt->transport_lock);
- dropit:
- skb_free_datagram(sk, skb);
- out:
- read_unlock_bh(&sk->sk_callback_lock);
+ spin_unlock_bh(&xprt->transport_lock);
+}
+
+static void xs_local_data_receive(struct sock_xprt *transport)
+{
+ struct sk_buff *skb;
+ struct sock *sk;
+ int err;
+
+ mutex_lock(&transport->recv_mutex);
+ sk = transport->inet;
+ if (sk == NULL)
+ goto out;
+ for (;;) {
+ skb = skb_recv_datagram(sk, 0, 1, &err);
+ if (skb == NULL)
+ break;
+ xs_local_data_read_skb(&transport->xprt, sk, skb);
+ skb_free_datagram(sk, skb);
+ }
+out:
+ mutex_unlock(&transport->recv_mutex);
+}
+
+static void xs_local_data_receive_workfn(struct work_struct *work)
+{
+ struct sock_xprt *transport =
+ container_of(work, struct sock_xprt, recv_worker);
+ xs_local_data_receive(transport);
}
/**
@@ -1895,10 +1911,6 @@ static inline void xs_reclassify_socket(int family, struct socket *sock)
}
#endif
-static void xs_dummy_data_receive_workfn(struct work_struct *work)
-{
-}
-
static void xs_dummy_setup_socket(struct work_struct *work)
{
}
@@ -1946,7 +1958,7 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt,
xs_save_old_callbacks(transport, sk);
sk->sk_user_data = xprt;
- sk->sk_data_ready = xs_local_data_ready;
+ sk->sk_data_ready = xs_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_error_report = xs_error_report;
sk->sk_allocation = GFP_NOIO;
@@ -2777,7 +2789,7 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args)
xprt->ops = &xs_local_ops;
xprt->timeout = &xs_local_default_timeout;
- INIT_WORK(&transport->recv_worker, xs_dummy_data_receive_workfn);
+ INIT_WORK(&transport->recv_worker, xs_local_data_receive_workfn);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_dummy_setup_socket);